Insights into 2D graphene-like TiO2 (B) nanosheets as highly efficient catalyst for improved low-temperature hydrogen storage properties of MgH2
作者:Chen, M (Chen, Man)[ 1 ] ; Xiao, XZ (Xiao, Xuezhang)[ 1,4 ] ; Zhang, M (Zhang, Meng)[ 1 ] ; Mao, JF (Mao, Jianfeng)[ 2 ] ; Zheng, JG (Zheng, Jiaguang)[ 1 ] ; Liu, MJ (Liu, Meijia)[ 1 ] ; Wang, XC (Wang, Xuancheng)[ 1 ] ; Chen, LX (Chen, Lixin)[ 1,3 ]
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MATERIALS TODAY ENERGY
卷: 16
文献号: UNSP 100411
DOI: 10.1016/j.mtener.2020.100411
出版年: JUN 2020
文献类型:Article
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摘要
The development of low temperature hydrogen storage system is crucial for the wide application of renewable energy. A key obstacle for this system is the lack of efficient catalysts, in which two-dimensional nanosheets have attracted considerable attention because of their unique properties. Herein, we synthesized graphene-like TiO2 (B), and applied them as a highly efficient catalyst to dramatically enhance the low temperature hydrogen storage performances of MgH2. The MgH(2)s-TiO2 (B) quickly absorbs 5.32 and 5.50 wt% H-2 at low temperatures of 50 and 60 degrees C, respectively, which is superior to most of the previously catalyzed MgH2 composites. Moreover, MgH2-TiO2 (B) begins to desorb hydrogen at similar to 200 degrees C and release similar to 6.29 wt% H-2 below 288 degrees C. Careful microstructure analyses reveal that TiO2 (B) nanosheets are reduced to metallic Ti nanoparticles and wrinkled Ti2O3 upon ball milling and (de)hydriding processes, which creates lots of boundary interfaces between MgH2 and Ti-based catalysts, thus facilitating the hydrogen diffusion. Besides, the in-situ formed Ti has the intermediate electronegativity between Mg and H, which could weaken the MgeH bonds and decrease the dehydrogenation kinetic barriers. While in rehydrogenation, Ti nanoparticles act as effective heterogeneous nucleation agents of MgH2 nuclei, further promoting hydrogen absorption properties of MgH2-TiO2 (B). The present investigation provides clear evidence for remarkable catalytic effect of graphene-like TiO2 (B) on hydrogen absorption/desorption properties of MgH2, which is not only important for deeply understanding the mechanism, but also sheds lights for catalysis design towards practical low temperature hydrogen storage. (C) 2020 Elsevier Ltd. All rights reserved.
关键词
作者关键词:MgH2; Hydrogen storage; Low temperature; TiO2 (B) nanosheets; Catalytic mechanism
KeyWords Plus:ENHANCED DEHYDROGENATION PROPERTIES; DESORPTION PROPERTIES; TRANSITION-METALS; SORPTION KINETICS; CARBON; MECHANISMS; NI; CO; ABSORPTION; OXIDES
作者信息
通讯作者地址: Xiao, XZ; Chen, LX (通讯作者)
显示更多Zhejiang Univ, Sch Mat Sci & Engn, State Key Lab Silicon Mat, Hangzhou 310027, Peoples R China.
地址:
显示更多[ 1 ] Zhejiang Univ, Sch Mat Sci & Engn, State Key Lab Silicon Mat, Hangzhou 310027, Peoples R China
显示更多[ 2 ] Univ Wollongong, Inst Superconducting & Elect Mat, Australian Inst Innovat Mat, Wollongong, NSW 2522, Australia
[ 3 ] Key Lab Adv Mat & Applicat Batteries Zhejiang Pro, Hangzhou 310013, Peoples R China
显示更多[ 4 ] South China Univ Technol, Guangdong Prov Key Lab Adv Energy Storage Mat, Guangzhou 510640, Peoples R China
电子邮件地址:xzxiao@zju.edu.cn; lxchen@zju.edu.cn
基金资助致谢
基金资助机构显示详情授权号
National Key Research Program of China
2018YFB1502100
National Natural Science Foundation of China
51671173
51571179
Open Fund of the Guangdong Provincial Key Laboratory of Advance Energy Storage Materials
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出版商
ELSEVIER SCI LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
期刊信息
Impact Factor (影响因子): Journal Citation Reports
类别 / 分类
研究方向:Chemistry; Energy & Fuels; Materials Science
Web of Science 类别:Chemistry, Physical; Energy & Fuels; Materials Science, Multidisciplinary